Abstract: The present invention relates to a pharmaceutical composition comprising a liquid composition containing p-boronophenylalanine, in which the liquid composition is accommodated in a packaging material and satisfies the following Condition I or Condition II: Condition I: the liquid composition comprises substantially no antioxidant and a concentration of dissolved oxygen in the liquid composition is 3.5 ppm or less; Condition II: the liquid composition comprises an antioxidant and a concentration of dissolved oxygen in the liquid composition is 3.0 ppm or less.

Abstract: An object of the present invention is to provide a method for preventing precipitation by storing an injection solution for boron neutron capture therapy. The present invention provides a method for preventing precipitation of an injection solution for boron neutron capture therapy, the injection solution containing p-boronophenylalanine or a pharmaceutically acceptable salt thereof; a sugar alcohol; and a pH adjusting agent, having a pH of 6.5 to 8.0 and an osmotic pressure ratio of 1.0 to 1.8, and being to be administered by intravenous drip injection.

Abstract: An object of the present invention is to provide an injection solution for boron neutron capture therapy. Provided is an injection solution for boron neutron capture therapy, containing p-boronophenylalanine or a pharmaceutically acceptable salt thereof, with a ratio of boron 10 of boron atoms in a compound of 75% or more; a sugar alcohol; an antioxidant; and water, the injection solution having a pH of 6.5 to 7.8 and an osmotic pressure ratio of 1.0 to 1.8, the injection solution being to be administered by intravenous drip injection.